JP2013129963A - Railway viaduct connection structure - Google Patents

Abstract

An object of the present invention is to improve train running performance by suppressing mistakes in a viaduct structure.
A brace structure 4 is sandwiched between ducts 8a and 8b and ladder sleepers 7 located at side edges of floor slabs 6a and 6b, and a brace structure 4 'is sandwiched between ladder sleepers 7 and 7, respectively. As shown, the brace structure is bridged over the opposite ends 3a and 3b of the ramen viaduct, and one of the longitudinal side edges of the rectangular frame 21 is the floor slab side attachment mechanism 31. The brace structure 4 ′ is a rectangular frame so that the other side abuts against the side surface of the vertical beam 11 of the ladder sleeper 7 via the track-side attachment mechanism 32. 21 are arranged so that the long side edge portions 21 are in contact with the opposite side surfaces of the longitudinal beams 11 and 11 via the track side attachment mechanisms 33 and 33, respectively.
[Selection] Figure 2

Description

  The present invention relates to a connection structure of a railway viaduct provided with a ladder track.

  For viaducts, it is important to ensure safety in the event of an earthquake regardless of whether it is for roads or railways. However, in the viaduct for railways, the safety of trains traveling on tracks during earthquakes is extremely important. Become.

  In the railway viaduct, based on the properties of the supporting ground, ground traffic conditions, etc., a ramen viaduct and an overpass are combined as appropriate, and an adjustment girder is bridged between the two ramen viaducts, or the overhang of the ramen viaduct Heterogeneous structures in which a plurality of different viaduct structures are arranged along the bridge axis direction as a whole, such as being arranged so that they face each other, or the girders constituting the bridge bridge are arranged adjacent to each other It can be said that it is a group.

  For this reason, railway viaducts exhibit different earthquake behavior depending on the location. For example, two adjacent ramen viaducts along the bridge axis direction vibrate in the orthogonal direction of the bridge axis with different natural periods. There may be a case of non-uniform displacement at each end.

JP 2009-235729 A JP 55-148805 A JP-A-9-13319

  Among the above-mentioned non-uniform displacements, the relative displacement along the direction perpendicular to the bridge axis is called a misdirection, but this misalignment causes bending and buckling of the train track laid on the floor slab of the viaduct superstructure. Cause a large impact on the running stability of the train.

  For this reason, it is necessary to suppress the mistakes that occur at the viaduct end, but the preventive measures against the mistakes are not always sufficient, and there is still room for improving the train running performance during an earthquake.

  The present invention has been made in consideration of the above-described circumstances, and has a railway viaduct connection structure that can improve train running performance at the time of an earthquake by suppressing misunderstandings at opposite ends of the viaduct structure. The purpose is to provide.

  In order to achieve the above object, the railway viaduct connection structure according to the present invention is as described in claim 1 and includes two viaducts arranged substantially adjacent to each other along a bridge axis direction in a substantially rectangular shape. A floor slab-side reaction force portion provided on each side edge of the floor slab of each viaduct structure and a single ladder laid on each floor slab so as to be bridged between opposing ends of the structure Between the floor slab-side reaction force portion and the single ladder-shaped sleeper structure, and at least one of the shear resistance body and the bridge axis relative to each other. It is configured to allow movement.

  Moreover, the connecting structure of the railway viaduct according to the present invention is the opposing end of two viaduct structures arranged adjacent to each other along the bridge axis direction. A floor slab side reaction force portion provided on each side edge of the floor slab of each viaduct structure and a plurality of ladder-shaped sleeper structures parallel to each other laid on each floor slab Among the outermost ladder-shaped sleeper structure and between the adjacent ladder-shaped sleeper structures, respectively, the floor slab side reaction force portion and the outermost position of the outermost position At least one of the ladder-shaped sleeper structures and the shear resistor are configured to allow relative movement of the bridge axes, and at least one of the adjacent ladder-shaped sleeper structures and the shear resistor. When In which their bridge axis relative movement is configured to be allowed.

  Moreover, the connection structure of the railway viaduct according to the present invention is configured such that the shear resistance body yields before the ladder-shaped sleeper structure during an earthquake.

  In the railway viaduct connection structure according to the present invention, the shear resistor has a dimension along the bridge axis direction that is longer than the installation interval of the horizontal beams constituting the ladder-shaped sleeper structure.

  In the railway viaduct connection structure according to the present invention, the shear resistor is configured by a brace structure including a rectangular frame and a brace arranged inside the rectangular frame.

  Moreover, the connection structure of the railway viaduct according to the present invention is such that one of the two edges that are opposite to each other on the periphery of the shear resistor is on the side surface of the floor slab reaction force part. The other edge is in contact with the side surface of the longitudinal beam constituting the single ladder-shaped sleeper structure.

  In addition, the railway viaduct connection structure according to the present invention includes a shear resistor sandwiched between the floor slab reaction force portion and the outermost ladder-shaped sleeper structure among the shear resistors. Ladder-shaped sleeper structure in which one edge is abutted against the side surface of the floor slab reaction force part and the other edge is the outer edge of the two edges that are opposite to each other. And two edges that are opposite to each other on the periphery of the shear resistor sandwiched between the adjacent ladder-shaped sleeper structures. Are configured to be in contact with the opposite side surfaces of the longitudinal beams constituting the adjacent ladder sleeper structures.

  In the railway viaduct connection structure according to the present invention, the shear resistor is brought into contact with the side surface of the floor slab side reaction force portion, the side surface of the vertical beam, or the opposite side surface of the vertical beam via a friction reducing material. It is configured.

  Further, the railway viaduct connection structure according to the present invention is configured such that the shear resistor is brought into contact with the side surface of the floor slab reaction force portion, the side surface of the vertical beam, or the opposite side surface of the vertical beam via a spacer. It is a thing.

  Ladder sleepers consist of two parallel beams made of prestressed concrete and steel joints and end-closed beams that are arranged orthogonally at their intermediate and end positions to interconnect the vertical beams. It is widely used as a sleeper with excellent maintenance labor saving and orbital buckling stability, but the present applicant uses the high rigidity of the two opposed viaduct structures. As a result of repeated research and development, we have obtained the above-mentioned knowledge.

  The connecting structure of the railway viaduct according to the present invention bridges a substantially rectangular shearing resistance body between opposing ends of two viaduct structures, and a single ladder-shaped sleeper structure is laid. In some cases, such a shear resistor is composed of a floor slab side reaction force section standing on the side edge of each slab of each viaduct structure and a single ladder-shaped sleeper structure laid on each floor slab. So that the relative movement of the bridge axis is allowed between at least one of the floor slab side reaction force part and the single ladder-shaped sleeper structure and the shear resistor. And when a plurality of ladder-shaped sleeper structures are laid, among the plurality of ladder-shaped sleeper structures, between the outermost ladder-shaped sleeper structure and the floor slab reaction force portion Place a shear resistor and next to it A shear resistor is arranged between the ladder-shaped sleeper structures, and at least one of the floor-side reaction force part and the outermost ladder-shaped sleeper structure and the shear resistor are moved relative to each other on the bridge axis. It is comprised so that it may be accept | permitted, and it is comprised so that those bridge axis relative movement may be accept | permitted at least any one among the adjacent ladder-shaped sleeper structures.

  In such a configuration, the shear resistor is bridged between the opposite ends of the two viaduct structures, and is sandwiched between the floor slab reaction force portion and the ladder-shaped sleeper structure, or further, the ladder-shaped sleeper Since the opposing ends of the two elevated bridge structures are about to move horizontally relative to each other in the direction perpendicular to the bridge axis because the structure is sandwiched between the structures, It resists shear deformation in the form of each taking a reaction force from the structure or in the form of taking a reaction force from each of two adjacent ladder-shaped sleeper structures.

  That is, the shear resistor exhibits the function of integrating the opposite end portions of the two viaduct structures in the horizontal direction via the ladder-shaped sleeper structure. Horizontal relative movement (horizontal misalignment) at the opposite end of the viaduct structure is suppressed, and along with this, the deformation of the ladder-shaped sleeper structure itself is reduced, thus running on the rails laid on the ladder-shaped sleeper structure The traveling safety of trains to be improved.

  The viaduct structure includes at least a ramen viaduct, a regulating girder, or an overpass (girder bridge), and the two viaduct structures in the present invention are all combinations that may cause a difference between them. For example, a combination of a ramen viaduct and an adjustment girder or a combination of ramen viaducts is an object.

  The ladder-shaped sleeper structure functions as a reaction force site on the track side of the shearing resistor, and includes two parallel sleepers on which the railroad rails are respectively mounted, as well as the conventional ladder sleepers described above. It means a structure composed of vertical beams and horizontal beams interconnecting them in the orthogonal direction. In conventional ladder sleepers, joint members and end joint beams correspond to the horizontal beams.

  Ladder-shaped sleeper structure is sufficient if it is installed near the opposite end of each floor slab of two viaduct structures, and each is installed alone so as to straddle each floor slab, Including the case where it is individually installed on the floor slab.

  The floor slab side reaction force part can function as a reaction force part on the floor slab side of the shear resistor. For example, various cables including a rising part erected on the edge of the floor slab are laid. Therefore, the duct used for the purpose can be a floor slab reaction force portion.

  The railway viaduct connection structure according to the present invention can be applied to a track employing a ladder sleeper structure, for example, a ballast ladder track or a floating ladder track.

  The shear resistor can be arbitrarily configured as long as the shear rigidity suppresses the horizontal relative movement at the time of an earthquake along the direction perpendicular to the bridge axis at the opposite ends of the two viaduct structures. If the shear resistor is configured to yield before the ladder-shaped sleeper structure during an earthquake, the vibration energy of the viaduct structure can be absorbed by the plastic deformation of the shear resistor. Differences can be prevented more reliably, and damage to ladder-shaped sleeper structures and viaduct structures can be prevented. Therefore, after an earthquake, it is sufficient to replace only the yielding shear resistors, resulting in maintenance costs. Can be greatly reduced.

  As described above, the configuration of the shear resistor is arbitrary, but the ladder sleeper structure is a structure composed of vertical beams and horizontal beams, and load transmission using the rigidity by the structure is reliably performed. In this case, the dimension of the shear resistor along the direction of the bridge axis is preferably longer than the installation interval of the joint material in the case of a horizontal beam constituting the ladder-shaped sleeper structure, or a conventional ladder sleeper.

  For example, the shear resistor can be constituted by a brace structure including a rectangular frame and a brace arranged inside the rectangular frame.

  As long as the shear resistance body can take a reaction force from the floor slab side reaction force part or the ladder-shaped sleeper structure, the mating structure with the floor slab side reaction force part or the ladder-like sleeper structure is arbitrary, In the case where a single ladder-shaped sleeper structure is laid, for example, one of the two edges that are opposite to each other at the periphery of the shear resistor is on the floor slab side. It can be configured such that it abuts against the side surface of the reaction force portion and the other edge abuts against the side surface of the vertical beam constituting the single ladder-shaped sleeper structure.

  Further, when a plurality of ladder-shaped sleeper structures are laid, the shear sandwiched between the floor slab reaction force portion and the outermost ladder-shaped sleeper structure among the shearing resistors Of the two edges that are opposite to each other on the periphery of the resistor, one edge is in contact with the side surface of the floor slab reaction force part, and the other edge is at the outermost position. The ladder-shaped sleeper structure is configured to be in contact with the side surface of the longitudinal beam constituting the ladder-shaped sleeper structure, and the shear resistor sandwiched between the adjacent ladder-shaped sleeper structures is configured to have a peripheral edge opposite to each other. The two edge portions can be configured to abut against the opposite side surfaces of the longitudinal beams constituting the adjacent ladder-shaped sleeper structure.

  The two viaduct structures move relative to each other in the bridge axis direction due to factors such as temperature shrinkage and drying shrinkage. In this case, at least one of the floor slab side reaction force part and the single ladder-like sleeper structure and the shear resistor are allowed to move relative to each other in the bridge axis. In the case where a plurality of ladder-shaped sleeper structures are laid, at least one of the floor-slab reaction force portion and the outermost ladder-shaped sleeper structure and the shear resistance body are connected to each other. The relative movement of the bridge axis is allowed, and at least one of the adjacent ladder-shaped sleeper structures and the shear resistor are allowed to move relative to each other. For example, the shear resistor may be configured to contact the side surface of the floor slab reaction force portion, the side surface of the vertical beam, or the opposite side surface of the vertical beam via a friction reducing material. That's fine.

  Specifically, when a single ladder-shaped sleeper structure is laid, at least one of the two edges of the shear resistor, or at least the side surface of the floor slab reaction force portion and the side surface of the longitudinal beam What is necessary is just to comprise so that a friction reducing material may be attached to either and a shear resistance body may be contact | abutted to the side surface of a floor slab side reaction force part or the side surface of a vertical beam through this friction reducing material.

  In addition, in the case where a plurality of ladder sleeper structures are laid, in addition to the above-described structure, the friction is applied to at least one of the two edges of the shearing resistor or at least one of the opposite side surfaces of the longitudinal beam. What is necessary is just to comprise so that a reduction | restoration material may be attached and a shear resistance body may contact | abut to the opposing side surface of a vertical beam through this friction reduction material.

  Further, the shear resistor is brought into contact with the side surface of the floor slab reaction force portion, the side surface of the longitudinal beam constituting the ladder-shaped sleeper structure, or the opposite side surface of the longitudinal beam constituting the ladder-shaped sleeper structure through the spacer. If configured, between the shear resistor and the floor beam side reaction force portion or the longitudinal beam side surface constituting the ladder-shaped sleeper structure, or between the shear resistor and the opposite side surface of the longitudinal beam constituting the ladder-shaped sleeper structure Even if there is a gap between the two, by inserting a spacer into these gaps, between the shear resistor and the floor slab reaction force part, between the shear resistor and the ladder-shaped sleeper structure The horizontal force in the direction perpendicular to the bridge axis can be reliably transmitted between the two or ladder-shaped sleeper structures, and the horizontal misalignment at the opposite ends of the two viaduct structures can be reliably prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is the layout which showed the connection structure 1 of the railway viaduct concerning this embodiment, (a) is a side view, (b) is the arrow view seen from the AA line direction. The top view which showed the connection structure 1 of the railway viaduct concerning this embodiment. It is a figure showing connection structure 1 of a railroad viaduct concerning this embodiment, and is a detailed sectional view which meets a BB line (right half is omitted because it is symmetrical). The top view which showed the effect | action of the connection structure 1 of the railway viaduct concerning this embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a railway viaduct connection structure according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a layout diagram showing a railway viaduct connection structure according to the present embodiment, FIG. 2 is a plan view, and FIG. 3 is a detailed sectional view. The railway viaduct connection structure 1 according to this embodiment is applied to the ramen viaducts 2a and 2b as two viaduct structures arranged adjacent to each other along the bridge axis direction, as can be seen in FIG. Ladder sleepers 7 and 7 as ladder-shaped sleeper structures that are parallel to each other are laid on the floor slabs 6a and 6b of the ramen viaduct. A duct 8a as a plate side reaction force portion is provided, and a duct 8b as a floor plate side reaction force portion is provided at each side edge of the floor plate 6b.

  The railway viaduct connection structure 1 according to the present embodiment bridges the brace structure 4 and the brace structure 4 'as shear resistances to the opposite end portions 3a and 3b of the ramen viaducts 2a and 2b, respectively. The body 4 is arranged so as to be sandwiched between the ducts 8a and 8b located on the side edges of the floor slabs 6a and 6b and the ladder sleeper 7, and the brace structure 4 'is ladder sleepers 7 and 7 It is arrange | positioned so that it may be pinched | interposed between.

  The brace structure 4 and the brace structure 4 'are placed on the ballast 37 placed on the floor slabs 6a and 6b, respectively, as can be seen in FIGS. 2 and 3, and the rectangular frame 21 and the rectangular frame The ladder sleeper 7 is composed of two braces 22 and 22 arranged on the inner side, and the ladder sleeper 7 includes two parallel beams 11 and 11 formed of prestressed concrete, and intermediate positions and ends thereof. The brace structure 4 is composed of two steel plates 12 and end joint beams 13 as transverse beams that are arranged orthogonally at the respective positions and interconnecting the vertical beams. One of the long side edges of the rectangular frame 21 serving as the edge is brought into contact with the side surfaces of the ducts 8a and 8b through the floor slab side mounting mechanism 31, and the other is ladderd through the track side mounting mechanism 32. The brace structure 4 ′ is arranged so as to be in contact with the side surface of the longitudinal beam 11 that constitutes the sleeper 7, and the longitudinal side edge of the rectangular frame 21 serving as two edges opposite to each other is tracked. It arrange | positions so that it may contact | abut to the opposing side surface of the longitudinal beams 11 and 11 which comprise the ladder sleeper 7 and 7 via the side attachment mechanism 33 and 33, respectively.

  The brace structure 4 and the brace structure 4 ′ are configured to yield before the ladder sleeper 7 at the time of an earthquake, and the dimension along the bridge axis direction is the joint member 12 that constitutes the ladder sleeper 7. 12 is longer than the installation interval.

  As can be clearly seen in FIG. 3, the floor slab side mounting mechanism 31 includes a pedestal 34 having a L-shaped cross section applied to the corners of the ducts 8a and 8b and a spacer 35. A brace structure is formed on the upper surface of the pedestal 34. Legs 36 suspended from the corners of the rectangular frame 21 constituting the body 4 are placed, and the spacers 35 are inserted into the gaps between the side surfaces of the pedestals 34 and the legs 36. It has become.

  On the other hand, the track-side mounting mechanism 32 is composed of a pedestal having an L-shaped cross-section provided on the track-side longitudinal edge of the rectangular frame 21 constituting the brace structure 4, and the upper surface of the track-side mounting mechanism 32 forms the ladder sleeper 7. The lower surface of the beam 11 is received by the side surface of the vertical beam 11.

  Similarly, the track-side mounting mechanism 33 includes pedestals each having an L-shaped cross section provided at each longitudinal side edge of the rectangular frame 21 constituting the brace structure 4 ', and ladder sleepers 7 and 7 are formed on the upper surfaces thereof. Are received by the lower surfaces of the vertical beams 11, 11 and the side surfaces of the pedestals, respectively. In FIG. 3, the right half is omitted for the sake of convenience of the drawing, but it has a symmetrical structure, and the track-side mounting mechanism 33 is provided at the longitudinal side edges on both sides of the brace structure 4 ′. It has been.

  Friction reducing materials are provided on the side and upper surfaces of the pedestal 34 and the pedestal side and upper surfaces of the track-side mounting mechanism 32 constituting the floor slab side mounting mechanism 31, and the brace structure 4, the floor slabs 6a and 6b, and the ladder sleepers are provided. 7 is allowed to move relative to the bridge axis direction with respect to the bridge 7, and a friction reducing material is provided on the side surface and the upper surface of the pedestal constituting the track-side mounting mechanisms 33, 33. Relative movement along the bridge axis direction between ′ and ladder sleepers 7 and 7 is also allowed.

  As the friction reducing material, for example, a material sold by DuPont Co., Ltd. under the trade name of “Teflon (registered trademark)” may be formed in a plate shape or a sheet shape, adhered, or applied in a film shape.

  In order to construct the connection structure 1 of the railway viaduct according to the present embodiment, if the existing train track laid on the floor slabs 6a and 6b of the ramen viaduct 2a and 2b is not a ladder sleeper, the existing train track Of these, after removing the track in the vicinity of the opposed end portions 3a and 3b, ladder sleepers 7 and 7 are bridged over the opposed end portions.

  Next, the brace structure 4 is bridged between the opposite ends 3a and 3b of the ramen viaducts 2a and 2b so as to be sandwiched between the ducts 8a and 8b and the ladder sleeper 7, and is sandwiched between the ladder sleepers 7 and 7. As shown, the brace structure 4 'is bridged over the opposite ends 3a and 3b of the ramen viaducts 2a and 2b.

  When the brace structure 4 is installed as described above, the brace structure 4 is brought into contact with the side surface of the vertical beam 11 of the ladder sleeper 7 while the pedestal side surface of the track-side mounting mechanism 32 provided in the brace structure is in contact with the side surface of the vertical beam 11 of the ladder sleeper 7. By inserting the spacer 35 into the gap formed between the duct 8a and 8b, the bridge axis is orthogonal between the brace structure 4 and the ducts 8a and 8b and between the brace structure 4 and the ladder sleeper 7. Ensure that the horizontal force in the direction is transmitted.

  Further, the lower surface and the side surface of the leg 36 of the brace structure 4 are respectively received by the upper surface and the side surface of the pedestal 34 constituting the floor slab side attachment mechanism 31, so that the bridge shaft between the brace structure 4 and the floor slabs 6 a and 6 b is provided. The relative movement in the direction is absorbed, and the lower surface and the side surface of the vertical beam 11 of the ladder sleeper 7 are received by the upper surface and the side surface of the pedestal constituting the track side mounting mechanism 32 provided in the brace structure 4. The relative movement of the brace structure 4 and the ladder sleeper 7 in the bridge axis direction is absorbed.

  For the brace structure 4 ′ sandwiched between the ladder sleepers 7 and 7, the lower surfaces and the opposite side surfaces of the longitudinal beams 11 and 11 of the ladder sleepers 7 and 7 are provided on both longitudinal side edges of the brace structure 4 ′. By receiving on the upper and side surfaces of the pedestal constituting the track-side mounting mechanisms 33 and 33, the relative movement in the bridge axis direction between the brace structure 4 'and the ladder sleepers 7 and 7 is absorbed.

  If constructed in this way, even if the opposite ends 3a and 3b of the ramen viaducts 2a and 2b move relative to each other in the bridge axis direction due to temperature shrinkage or drying shrinkage, the relative movement is forcedly deformed so that the brace structure 4 and the brace structure Therefore, the brace structure 4 and the brace structure 4 'can be prevented from being damaged, and the relative movement of the ramen viaducts 2a and 2b is not prevented.

  For convenience of explanation, in the present embodiment, it is not necessary to adjust the gap when the brace structure 4 ′ is sandwiched between the ladder sleepers 7 and 7.

  In the railway viaduct connection structure 1 according to the present embodiment, the brace structure 4 is sandwiched between the ducts 8a and 8b and the ladder sleeper 7, and the brace structure 4 'is sandwiched between the ladder sleepers 7 and 7. As described above, the brace structure is stretched over the opposite ends 3a and 3b of the ramen viaducts 2a and 2b.

  Therefore, as shown by the arrows in FIG. 4, when the opposite ends 3 a and 3 b of the ramen viaducts 2 a and 2 b try to move horizontally relative to the direction perpendicular to the bridge axis, they are sandwiched between the ducts 8 a and 8 b and the ladder sleeper 7. The brace structure 4 resists shear deformation by the compressive force and tensile force of the braces 22 and 22 while taking the reaction force from them, and the brace structure 4 ′ sandwiched between the ladder sleepers 7 and 7 While taking the reaction force from them, the shearing deformation is similarly resisted by the compressive force and tensile force of the braces 22 and 22.

  As described above, according to the railway viaduct connection structure 1 according to the present embodiment, when the opposed end portions 3a, 3b of the ramen viaducts 2a, 2b are about to move horizontally relative to the bridge axis orthogonal direction during an earthquake, While the brace structure 4 takes a reaction force from the ducts 8a and 8b and the ladder sleeper 7, the brace structure 4 'resists a shear deformation while taking a reaction force from the ladder sleepers 7 and 7, respectively.

  That is, the brace structure 4 and the brace structure 4 ′ exhibit the function of integrating the opposite end portions 3a and 3b of the ramen viaducts 2a and 2b in the horizontal direction via the ladder sleeper 7, and in the event of an earthquake, Due to the deformation resistance function, the horizontal misalignment at the opposite ends 3a and 3b of the ramen viaducts 2a and 2b is suppressed, and accordingly, the deformation of the ladder sleeper 7 itself is reduced, and thus the rail laid on the ladder sleeper 7 The traveling safety of trains traveling on the road is greatly improved.

  Further, according to the railway viaduct connection structure 1 according to the present embodiment, the brace structure 4 and the brace structure 4 ′ are configured to yield before the ladder sleeper 7 at the time of an earthquake, so the ramen viaduct 2a , 2b can be absorbed by the plastic deformation of the brace structure 4 and the brace structure 4 ', and the horizontal misalignment can be more reliably prevented, and the ladder sleeper 7 and the ramen viaduct 2a, 2b can be prevented. Therefore, after the earthquake, it is sufficient to replace only the yielded brace structure 4 or the brace structure 4 ′, and the maintenance cost can be greatly reduced.

  In addition, according to the railway viaduct connection structure 1 according to the present embodiment, the distance between the braces 4 and 12 constituting the ladder sleeper 7 is the dimension along the bridge axis direction of the brace structure 4 and the brace structure 4 ′. Therefore, load transmission utilizing the rigidity of the ladder sleeper 7 can be reliably performed.

  Moreover, according to the railway viaduct connection structure 1 according to the present embodiment, the spacer 35 is inserted into the gap formed between the brace structure 4 and the ducts 8a and 8b. 8a and 8b, and between the brace structure 4 and the ladder sleeper 7, it is possible to reliably transmit the horizontal force in the direction perpendicular to the bridge axis, and thus the opposite ends 3a and 3b of the ramen viaducts 2a and 2b. It is possible to reliably prevent the horizontal misalignment at.

  Further, according to the railway viaduct connection structure 1 according to the present embodiment, the lower surface and the side surface of the leg 36 of the brace structure 4 are respectively received by the upper surface and the side surface of the pedestal 34 of the floor slab side mounting mechanism 31, and 7 is configured to receive the lower surface and the side surface of the vertical beam 11 by the upper surface and the side surface of the pedestal constituting the track-side mounting mechanism 32 provided in the brace structure 4, and further, the side surface and the upper surface of the pedestal 34 are attached to the track side. Since the friction reducing material is provided on the pedestal side surface and the pedestal upper surface of the mechanism 32, relative movement in the bridge axis direction between the brace structure 4, the floor slabs 6a and 6b, and the ladder sleeper 7 can be absorbed.

  Further, according to the railway viaduct connection structure 1 according to the present embodiment, the lower side and the opposite side surfaces of the vertical beams 11 and 11 of the ladder sleepers 7 and 7 are connected to the track-side attachment mechanism 33 provided on the brace structure 4 ′. Since the upper surface and the side surface of the pedestal constituting the base 33 are respectively received and the friction reducing material is provided on the upper surface and the side surface of the pedestal constituting the track-side mounting mechanisms 33, 33, the brace structure 4 ' Relative movement in the bridge axis direction with the ladder sleepers 7, 7 can be absorbed.

  Therefore, even if the opposite end portions 3a and 3b of the ramen viaducts 2a and 2b move relative to each other in the bridge axis direction due to temperature shrinkage or drying shrinkage, the relative movement acts on the brace structure 4 and the brace structure 4 'as forced deformation. Therefore, the brace structure 4 and the brace structure 4 'can be prevented from being damaged, and the relative movement of the ramen viaducts 2a and 2b is not hindered.

  In the present embodiment, the ramen viaducts 2a and 2b are taken as examples of the two viaduct structures, but the present invention can be applied to, for example, the ramen viaduct and the opposite end of the adjustment girder.

  Further, in the present embodiment, the case where the ladder sleeper 7 is straddled across the opposed end portions 3a, 3b of the ramen viaducts 2a, 2b is exemplified, but instead, the opposed end portions of the ramen viaducts 2a, 2b are used. The present invention can also be applied when ladder sleepers 7 are individually laid on 3a and 3b.

  Further, in this embodiment, the case where two ladder sleepers 7 and 7 are laid is targeted, but the present invention can also be applied to the case where three or more ladder sleepers 7 are arranged in parallel. The brace structure 4 is disposed between the ducts 8a and 8b and the outermost ladder sleeper 7, and the brace structure 4 'is disposed between the adjacent ladder sleepers 7 and 7, respectively. That's fine. On the contrary, in the case of a single track where only one ladder sleeper 7 is laid, the brace structure 4 may be disposed only between the ducts 8a and 8b and the ladder sleeper 7.

  Moreover, in this embodiment, although duct 8a, 8b was selected as a floor slab side reaction force part, it can replace with this and can select arbitrary site | parts.

  Further, in this embodiment, for convenience of explanation, when the brace structure 4 ′ is sandwiched between the ladder sleepers 7 and 7, there is no gap between them, and the gap adjustment is not necessary. In the case where there is, the gap adjustment is performed on either side or both sides of the longitudinal side edge portion of the brace structure 4 ′ by using a spacer similar to the spacer 35 of the floor slab side attachment mechanism 31. You can do it.

  In the present embodiment, the friction reducing material is provided on the side surface and the upper surface of the pedestal 34 constituting the floor slab side mounting mechanism 31 and the pedestal side surface and the pedestal upper surface of the track side mounting mechanism 32. If the relative movement of the bridge axis with the floor slabs 6a and 6b and the ladder sleeper 7 is allowed, friction is applied to either one of them, that is, the side surface and the upper surface of the pedestal 34 constituting the floor slab side mounting mechanism 31. It is sufficient if a reducing material is provided or a friction reducing material is provided on the pedestal side surface and the pedestal upper surface of the track-side mounting mechanism 32. Further, instead of providing the friction reducing material on the side surface and the upper surface of the pedestal 34 constituting the floor slab side mounting mechanism 31, the friction reducing material may be provided on the legs 36 of the brace structure 4.

  Similarly, friction reducing materials are provided on the side surfaces and the upper surface of the pedestal constituting the track side mounting mechanisms 33, 33. However, since the bridge shaft relative movement between the brace structure 4 'and the ladder sleepers 7, 7 is allowed. If there is, it is sufficient to provide a friction reducing material on any one of these, that is, on one of the side surfaces and the upper surface of the track-side attachment mechanisms 33 and 33.

  In the present embodiment, a friction reducing material is provided on the upper surface of the pedestal 34 constituting the floor slab side mounting mechanism 31 and the upper surface of the pedestal side mounting mechanism 32, and on the upper surface of the pedestal constituting the track side mounting mechanisms 33, 33. Although the friction reducing material is provided, if it is not necessary to consider the influence of the vertical load of the brace structure 4 and the brace structure 4 ', these friction reducing materials may be omitted.

  Although not particularly mentioned in the present embodiment, if it is necessary to adjust the installation height of the brace structure 4 and the brace structure 4 ′, the height can be adjusted with an appropriate spacer as with the spacer 35. What is necessary is just to perform the uneven adjustment.

1 Railroad viaduct connection structure 2a, 2b Ramen viaduct (two viaduct structures)
3a, 3b Opposing ends 4, 4 'Brace structure (shear resistance)
6a, 6b Floor slab 7 Ladder sleeper (ladder-shaped sleeper structure)
8a, 8b Duct (floor side reaction force part)
11 Longitudinal beam 12 Joint (horizontal beam)
21 Rectangular frame 22 Brace

Claims (9)

A lateral resistance portion of the floor slab of each viaduct so that the shearing resistor having a substantially rectangular shape is bridged over the opposite ends of the two viaducts arranged adjacent to each other along the bridge axis direction. Each of the floor slab side reaction force portions and the single ladder-shaped sleeper structure laid on each floor slab. A connecting structure of a railway viaduct, wherein at least one of the ladder-shaped sleeper structures and the shear resistor are configured to allow relative movement of their bridge axes. A lateral resistance portion of the floor slab of each viaduct so that the shearing resistor having a substantially rectangular shape is bridged over the opposite ends of the two viaducts arranged adjacent to each other along the bridge axis direction. Ladder side reaction force portion provided respectively on each and a plurality of ladder-shaped sleeper structures parallel to each other laid on each of the floor slabs, and an adjacent ladder between the outermost ladder-shaped sleeper structure And arranged so as to be sandwiched between the sleeper-like sleeper structures, and at least one of the floor-slab reaction force portion and the outermost ladder-like sleeper structure and the shearing resistance member thereof. It is configured to allow relative movement, and at least one of the adjacent ladder-shaped sleeper structures and the shear resistance are configured to allow relative movement of their bridge axes. iron The connection structure of the viaduct. The connection structure of a railway viaduct according to claim 1 or 2, wherein the shear resistor is configured to yield before the ladder-shaped sleeper structure during an earthquake. The connecting structure of the railway viaduct according to claim 1 or 2, wherein the shear resistor has a dimension along the bridge axis direction that is longer than an installation interval of transverse beams constituting the ladder-shaped sleeper structure. The railroad viaduct connection structure according to claim 1 or 2, wherein the shear resistor is configured by a brace structure including a rectangular frame and a brace disposed inside the rectangular frame. Of the two edges that are opposite to each other at the periphery of the shear resistor, one edge is brought into contact with the side surface of the floor slab reaction force portion, and the other edge is the single edge. The railway viaduct connection structure according to claim 1, wherein the connection structure is in contact with a side surface of a longitudinal beam constituting the ladder sleeper structure. Among the shear resistors, two edge portions which are the peripheral edges of the shear resistor sandwiched between the floor-slab reaction force portion and the outermost ladder-shaped sleeper structure and opposite to each other. Of these, one edge is in contact with the side surface of the floor slab reaction force portion, and the other edge is in contact with the side surface of the longitudinal beam constituting the outermost ladder-shaped sleeper structure. And a shear resistor sandwiched between the adjacent ladder-shaped sleeper structures, the two edges on the opposite sides of the shearing resistor are adjacent to each other to form the adjacent ladder-shaped sleeper structure. The connecting structure for a railway viaduct according to claim 2, wherein the connecting structure is configured so as to be in contact with the opposite side surfaces of the beam. The railway according to claim 6 or 7, wherein the shear resistor is configured to abut on a side surface of the floor slab reaction force portion, a side surface of the longitudinal beam, or an opposite side surface of the longitudinal beam via a friction reducing material. Viaduct connection structure. 9. The structure according to claim 6, wherein the shear resistor is configured to contact a side surface of the floor slab reaction force portion, a side surface of the vertical beam, or an opposite side surface of the vertical beam via a spacer. Railway viaduct connection structure.

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